How software defined networking and cloud computing pave the way towards a digital society
October 29, 2014
Grazed from CloudTech. Author: Antonio Manzalini.
Ultra-broadband network proliferation, advances in information technology and the evolution of endpoint devices have created the conditions for re-inventing telecommunications networks and services architectures. Software defined networking (SDN) and network function virtualization (NFV) are just two facets of the so-called “IT-zation or softwarization” of telecom infrastructures.
SDN decouples the software, control plane, from the forwarding hardware of nodes such as routers and switches and executes the control software in the cloud or in any standard or hybrid processing resources made available, such as blades or servers. SDN doesn’t just affect the evolution of Layer 2 and Layer 3 services such as switching and networking, but also impacts Layer 4 to Layer 7 network functions…
In reality, there are a lot of middle-boxes deployed in current networks, including Wide Area Network (WAN) optimizers, Network Address Translation (NAT), performance-enhancing-proxies, intrusion detection and prevention systems such as firewalls. Virtualizing these middle-boxes network functions allow for considerable cost savings, and this is where NFV plays a role: virtualized network functions can be dynamically deployed and moved to various locations of an infrastructure where processing power is available, not only distributed into the network but even into the cloud…
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